We're still not sure how many angels could fit on the head of a pin (that would depend how many nanometers wide an angel is, naturally), but today's advanced micromachining techniques give scientists the ability to fabricate complex objects on a scale never before possible. And things just keep getting more interesting. See for yourself in this gallery of tiny wonders, from miniature submarines capable of sailing through your blood vessels to tiny eyeglasses for houseflies.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
Inside NASA's astronaut bootcamp and the grueling new training regimen for deep space. Plus, ten young geniuses shaking up science today, one writer's quest to analyze every man-made chemical in her body and more.
Check out the issue's full contents online here